Not only did Google have no migration path, they emailed all our customers saying their subscription was cancelled with no explanation why, leading to panic.
Additionally, prior to the retirement they had advised that they wouldn't be communicating it to subscribers.
The retirement was so poorly handled that it's changed the way I think about services that I allow my business to depend on. Aside from a slight bias against anything with a "Google" label, I now consider it a lot more important that a service I'm using is the core business of the company providing it.
Really, I hadn't seen them specifically say that they wouldn't email everyone (although if anyone had thought about it they'd realize it was a bad idea).
Yeah, we went with GWDG at the time primarily because it was one of the few good options for a NZ-based company, but it was always a bit strange and I always thought given the lack of maintenance it was likely to get killed. Switched to Stripe and much happier, although I do miss the awesome microtransaction pricing they had...
Google Wallet buyers will not be proactively notified. Keep in mind that if you do not remove your integration before March 2, 2015, your buyers will get 404 errors upon checking out with Google Wallet for digital goods API. To preserve your user experience, we highly recommend removing your integration and migrating to another payment processing solution as soon as possible.
